Get the lens out, use it. It really is a spectacular lens. The two that I've got, the polished all'y and the black 'hand grenade' versions, share the same optics, which I seriously believe are the best out of the 14 or 15 135mm lenses that I've got, including Takumars, Rokkors, Zuikos Canon's and all kinds of third party lenses. I'm sure there will be copy variation due to the indifferent Soviet quality control ( I once owned a Lada ) but a good one will almost certainly become your 'go to' 135 lens.